<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Form
 * @subpackage Decorator
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
/**
 * Zend_Form_Decorator_Abstract
 */
require_once 'Zend/Form/Decorator/Abstract.php';
/**
 * Zend_Form_Decorator_Marker_File_Interface
 */
require_once 'Zend/Form/Decorator/Marker/File/Interface.php';
/**
 * Zend_File_Transfer_Adapter_Http
 */
require_once 'Zend/File/Transfer/Adapter/Http.php';

/**
 * Zend_Form_Decorator_File
 * Fixes the rendering for all subform and multi file elements
 * @category Zend
 * @package Zend_Form
 * @subpackage Decorator
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: File.php 25067 2012-11-03 14:20:28Z rob $
 */
class Zend_Form_Decorator_File extends Zend_Form_Decorator_Abstract implements Zend_Form_Decorator_Marker_File_Interface {

    /**
     * Attributes that should not be passed to helper
     * @var array
     */
    protected $_attribBlacklist = array('helper', 'placement', 'separator', 'value');

    /**
     * Default placement: append
     * @var string
     */
    protected $_placement = 'APPEND';

    /**
     * Get attributes to pass to file helper
     * @return array
     */
    public function getAttribs () {
        $attribs = $this -> getOptions ();
        if (null !== ($element = $this -> getElement ())) {
            $attribs = array_merge ($attribs, $element -> getAttribs ());
        }
        foreach ($this -> _attribBlacklist as $key) {
            if (array_key_exists ($key, $attribs)) {
                unset ($attribs[$key]);
            }
        }
        return $attribs;
    }

    /**
     * Render a form file
     * @param string $content
     * @return string
     */
    public function render ($content) {
        $element = $this -> getElement ();
        if ( ! $element instanceof Zend_Form_Element) {
            return $content;
        }
        $view = $element -> getView ();
        if ( ! $view instanceof Zend_View_Interface) {
            return $content;
        }
        $name = $element -> getName ();
        $attribs = $this -> getAttribs ();
        if ( ! array_key_exists ('id', $attribs)) {
            $attribs['id'] = $name;
        }
        $separator = $this -> getSeparator ();
        $placement = $this -> getPlacement ();
        $markup = array();
        $size = $element -> getMaxFileSize ();
        if ($size > 0) {
            $element -> setMaxFileSize (0);
            $markup[] = $view -> formHidden ('MAX_FILE_SIZE', $size);
        }
        if (Zend_File_Transfer_Adapter_Http::isApcAvailable ()) {
            $markup[] = $view -> formHidden (ini_get ('apc.rfc1867_name'), uniqid (), array('id' => 'progress_key'));
        } else 
            if (Zend_File_Transfer_Adapter_Http::isUploadProgressAvailable ()) {
                $markup[] = $view -> formHidden ('UPLOAD_IDENTIFIER', uniqid (), array('id' => 'progress_key'));
            }
        $helper = $element -> helper;
        if ($element -> isArray ()) {
            $name .= "[]";
            $count = $element -> getMultiFile ();
            for ($i = 0; $i < $count;  ++ $i) {
                $htmlAttribs = $attribs;
                $htmlAttribs['id'] .= '-' . $i;
                $markup[] = $view -> $helper ($name, $htmlAttribs);
            }
        } else {
            $markup[] = $view -> $helper ($name, $attribs);
        }
        $markup = implode ($separator, $markup);
        switch ($placement) {
            case self::PREPEND :
                return $markup . $separator . $content;
            case self::APPEND :
            default :
                return $content . $separator . $markup;
        }
    }

}
